Material for producing electrically conducting connections in thermoplastic moldings

Abstract

The invention relates to a material for producing electrically conducting connections in thermoplastic moldings, wherein the material contains a thermoplastic containing 0.5 to 30% by volume of conductive fibers having a length of 5 to 20 mm and a diameter of 5 to 100 μm and has a volume resistivity of less than 1 ohm.cm.

What is claimed is: 
     
       1. A material for producing conductor tracks in thermoplastic moldings, wherein the material comprises a thermoplastic containing 0.5 to 30% by volume of conductive fibers and up to 50% by volume of nonconducting fillers, the fibers having a length of 5 to 20 mm and a diameter of 5 to 100 μm, and the material having a volume resistivity of less than 1 ohm.cm. 
     
     
       2. The material as claimed in claim 1, wherein the conductive fibers are selected from the group consisting of metal fibers, metallized glass fibers and carbon fibers. 
     
     
       3. The material as claimed in claim 1, further comprising a powdered conductive filler. 
     
     
       4. The material as claimed in claim 1, wherein the nonconducting fillers are composed of short glass fibers up to 0.5 mm long. 
     
     
       5. The material as claimed in claim 2, wherein the metal fiber is a stainless steel fiber. 
     
     
       6. The material as claimed in claim 3, wherein the conductive filler is conducting soot. 
     
     
       7. The material as claimed in claim 3, wherein the conductive filler is a metal powder selected from the group consisting of iron, steel, copper, aluminum and nickel. 
     
     
       8. The material as claimed in claim 2, wherein the metal fiber is selected from the group consisting of iron, steel, copper, aluminum and nickel. 
     
     
       9. The material as claimed in claim 1, further comprising up to 10% by volume of nonconducting fillers. 
     
     
       10. The material as claimed in claim 1, wherein the nonconducting fillers are composed of long glass fibers 5 to 20 mm long. 
     
     
       11. The material as claimed in claim 1 which contains 10 to 50% by volume of nonconducting fillers. 
     
     
       12. Conductor tracks in thermoplastic moldings, wherein the conductor tracks have a length/width ratio of at least five and are comprised of a material, said material comprising a thermoplastic containing 0.5 to 30% by volume of conductive fibers having a length of 5 to 20 mm and a diameter of 5 to 100 μm, said material having a volume resistivity of less than 1 ohm.cm.